Have let the park pilots in an Opel Astra G installed by a specialist workshop. There were no problems. The LED display was installed behind the right of the rear window, making it easy to see in the rearview mirror. The acoustic and visual indication is perfect and very accurate. No comparison with a no-name product that I had built previously, The Park Pilot works for me also with fitted towbar can be kalibriet ensprechend. The parking is absolutely worth the money. I can highly recommend.